AirHint found the following cheapest return flights from Las Vegas (LAS) to London (LHR) in September 2025 (see full year).

Return flights

30 Sep - 13 Oct	SWISS
28 Sep - 15 Oct	Iberia
30 Sep - 06 Oct	Air Canada
25 Sep - 30 Sep	Delta
23 Sep - 30 Sep	Spirit Airlines
24 Sep - 01 Oct	Spirit Airlines
28 Sep - 17 Oct	Air Canada
25 Sep - 18 Oct	Lufthansa
28 Sep - 06 Oct	British Airways
22 Sep - 18 Oct	jetBlue
23 Sep - 01 Oct	jetBlue
23 Sep - 18 Oct	jetBlue
24 Sep - 29 Sep	jetBlue
23 Sep - 26 Sep	jetBlue
23 Sep - 30 Sep	American Airlines	direct
20 Sep - 27 Sep	KLM	direct
23 Sep - 27 Sep	Spirit Airlines
23 Sep - 26 Sep	American Airlines	direct
23 Sep - 27 Sep	Delta	direct

Also check the deals for one-way flights from Las Vegas to London in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from Las Vegas to London in September from $551

Return flights